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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 | 4x 4x 4x 4x 4x 4x 4x 9x 8x 8x 8x 17x 17x 10x 10x 17x 8x 4x 4x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 6x 34x 3x 3x 2x 2x 2x 1x 33x 33x 12x 11x 11x 11x 11x 11x 11x 4x 4x 3x 3x 47x 3x 44x 47x 47x 47x 3x 3x 3x 44x 40x 2x 38x 38x 40x 40x 40x 3x 3x 1x 1x 2x 2x 47x 47x 7x 7x 2x 2x 5x 45x 45x 3x 42x 5x 5x 37x 2x 2x 1x 1x 1x 35x | import { AuthService } from '../../auth/auth.service';
import { ArticleService } from '../article.service';
import { computed, DestroyRef, inject, Injectable, Signal, signal } from '@angular/core';
import { takeUntilDestroyed, toSignal } from '@angular/core/rxjs-interop';
import { LoggerService } from '@drevo-web/core';
import { ApprovalStatus, ArticleHistoryItem, ArticleHistoryParams, formatDateHeader } from '@drevo-web/shared';
export type HistoryFilter =
| 'all'
| 'unchecked'
| 'unfinished'
| 'unmarked'
| 'outside_dictionaries'
| 'required'
| 'my';
export type HistoryDisplayItem =
| { readonly type: 'header'; readonly date: string }
| { readonly type: 'version'; readonly data: ArticleHistoryItem };
/**
* Builds display items with date headers inserted between date groups.
*
* @param items - Flat list of history items sorted by date descending
* @param referenceDate - Date used for relative date formatting (e.g. "Сегодня")
* @returns Items interleaved with date group headers
*/
export function buildDisplayItems(
items: readonly ArticleHistoryItem[],
referenceDate: Date
): readonly HistoryDisplayItem[] {
if (items.length === 0) return [];
const result: HistoryDisplayItem[] = [];
let lastDateKey = '';
for (const item of items) {
const dateKey = formatDateHeader(item.date, referenceDate);
if (dateKey !== lastDateKey) {
result.push({ type: 'header', date: dateKey });
lastDateKey = dateKey;
}
result.push({ type: 'version', data: item });
}
return result;
}
export const trackByFn = (_index: number, item: HistoryDisplayItem): string => {
if (item.type === 'header') return `header-${item.date}`;
return `version-${item.data.versionId}`;
};
export interface ArticleHistoryConfig {
readonly articleId?: Signal<number | undefined>;
}
@Injectable()
export class ArticleHistoryService {
private readonly destroyRef = inject(DestroyRef);
private readonly articleService = inject(ArticleService);
private readonly authService = inject(AuthService);
private readonly logger = inject(LoggerService).withContext('ArticleHistoryService');
private readonly _historyItems = signal<readonly ArticleHistoryItem[]>([]);
private readonly _isLoading = signal(false);
private readonly _isLoadingMore = signal(false);
private readonly _totalItems = signal(0);
private readonly _currentPage = signal(1);
private readonly _activeFilter = signal<HistoryFilter>('all');
private readonly _hasError = signal(false);
private readonly _referenceDate = signal(new Date());
private articleId?: Signal<number | undefined>;
readonly isLoading = this._isLoading.asReadonly();
readonly isLoadingMore = this._isLoadingMore.asReadonly();
readonly activeFilter = this._activeFilter.asReadonly();
readonly hasError = this._hasError.asReadonly();
private readonly currentUser = toSignal(this.authService.user$);
readonly isAuthenticated = computed(() => !!this.currentUser());
readonly hasItems = computed(() => this._historyItems().length > 0);
readonly displayItems = computed<readonly HistoryDisplayItem[]>(() =>
buildDisplayItems(this._historyItems(), this._referenceDate())
);
readonly displayTotalItems = computed(() => {
const total = this._totalItems();
if (total === 0) return 0;
const loadedDisplayCount = this.displayItems().length;
const loadedItemCount = this._historyItems().length;
if (loadedItemCount >= total) return loadedDisplayCount;
return loadedDisplayCount + (total - loadedItemCount);
});
init(config?: ArticleHistoryConfig): void {
this.articleId = config?.articleId;
this.loadHistory();
}
onFilterChange(filter: HistoryFilter): void {
if (this._activeFilter() === filter) return;
this._activeFilter.set(filter);
this._historyItems.set([]);
this._currentPage.set(1);
this._totalItems.set(0);
this.logger.info('Filter changed', { filter });
this.loadHistory();
}
onLoadMore(): void {
Iif (this._isLoading() || this._isLoadingMore()) return;
if (this._historyItems().length >= this._totalItems()) return;
this._currentPage.update(p => p + 1);
this.loadHistory(true);
}
private loadHistory(loadMore = false): void {
if (loadMore) {
this._isLoadingMore.set(true);
} else {
this._isLoading.set(true);
}
this._hasError.set(false);
const params = this.buildParams();
if (!params) {
this._isLoading.set(false);
this._isLoadingMore.set(false);
return;
}
this.articleService
.getArticlesHistory(params)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe({
next: response => {
if (loadMore) {
this._historyItems.update(items => [...items, ...response.items]);
} else {
this._historyItems.set(response.items);
this._referenceDate.set(new Date());
}
this._totalItems.set(response.total);
this._isLoading.set(false);
this._isLoadingMore.set(false);
},
error: error => {
this.logger.error('Failed to load article history', error);
if (loadMore) {
this._isLoadingMore.set(false);
this._currentPage.update(p => p - 1);
} else {
this._isLoading.set(false);
this._hasError.set(true);
}
},
});
}
private buildParams(): ArticleHistoryParams | undefined {
let base: ArticleHistoryParams = {
page: this._currentPage(),
};
if (this.articleId) {
const id = this.articleId();
if (!id) {
this.logger.error('Cannot load history: article ID not available');
return undefined;
}
base = { ...base, articleId: id };
}
const filter = this._activeFilter();
if (filter === 'unchecked') {
return { ...base, approved: ApprovalStatus.Pending };
}
if (
filter === 'unfinished' ||
filter === 'unmarked' ||
filter === 'outside_dictionaries' ||
filter === 'required'
) {
this.logger.info('Filter not yet supported by backend', {
filter,
});
return base;
}
if (filter === 'my') {
const user = this.currentUser();
if (!user) {
this.logger.error('Cannot filter by author: user not loaded');
return undefined;
}
return { ...base, author: user.login };
}
return base;
}
}
|